FM 23-7 U.S. Carbine, Caliber .30, M1 1942-05-20
"The U. S. carbine, caliber .30, Ml, is a self-loading shoulder weapon (see fig. 1). It is gas operated, magazine fed, and air cooled. It weighs approximately 5 pounds. The weapon is fed from a box type magazine having a capacity of 15 rounds."
Digitized by the Combined Arms Research Library Digital Library, US Army Combined Arms Center. http://cgsc.cdmhost.com/cdm/